Free Online Stem Splitter
Separate any song into vocals, drums, bass, and other instruments using AI. Perfect for remixing, karaoke, sampling, or music production.
Vocals
Isolate the singing voice for karaoke or remixing
Drums
Extract the drum track for sampling or practice
Bass
Separate the bass line for learning or remixing
Other
Get everything else - guitars, synths, keys, etc.
How It Works
Upload Your Song
Drag & drop or select any audio file from your device
AI Processing
Our AI analyzes and separates the audio into stems
Download Stems
Get your separated tracks in high-quality WAV format
Why Choose Our Stem Splitter?
Music Stem Splitter — Isolate Vocals, Drums & Bass
Defyaudio is a free music stem splitter that turns any song into clean, isolated stems. Whether you need to isolate vocals for a remix, extract the drum loop for sampling, or pull out the bass line for transcription, the music stem splitter handles every part of the mix in a single pass.
Music stem splitter for remixers
Get clean vocal stems from any track to layer over a new beat — the music stem splitter preserves vocal clarity even on dense mixes.
Drum stems for sampling
Extract isolated drum stems from full songs — perfect for sampling, beat-making, or loading into a sampler.
Bass and instrumental stems
Separate bass and instrument stems for transcription, learning songs, or building backing tracks for live performance.
Karaoke and instrumental versions
Use the music stem splitter to create karaoke versions instantly — remove vocals from any song with one click.
Stems Separator Online — How the AI Works
Defyaudio is a stems separator online that runs the Demucs neural network entirely in your browser. Most online stems separators upload your file to a server and process it in a cloud queue — Defyaudio is different.
Demucs is a deep-learning model trained on thousands of hours of multitrack recordings. It learns to identify the spectral signature of each instrument family — vocals, drums, bass and other — and separate them from the mix with surgical precision. When you use Defyaudio as your stems separator online, the same model runs locally via WebAssembly so your music never leaves your device.
Because the stems separator online processes audio on your own hardware, there is no upload time, no queue, and no risk of your tracks being stored on a third-party server. The output is full-quality WAV — identical to what a cloud-based stems separator would produce, but with complete privacy.
What Is Stem Separation? Complete Guide
Stem separation is the process of splitting a mixed audio track into its individual components — typically vocals, drums, bass, and other instruments. Each isolated component is called a "stem". A stem splitter uses AI to analyse the frequency patterns in a song and disentangle them into separate, clean tracks.
Defyaudio offers a free stem splitter online powered by Demucs, an open-source AI model developed by Meta Research. It runs entirely in your browser via WebAssembly, so your audio files are never uploaded to any server. This makes it one of the most private stem splitter free tools available today.
Whether you want to create a karaoke version, isolate a vocal for a remix, practice along to a drumless track, or sample a bass line, stem separation gives you surgical control over any recording — without needing a DAW or professional studio equipment.
How to Use Stem Separation (Step-by-Step Guide)
Defyaudio's AI can separate instruments from any song in a few clicks. Here is how to get started.
- 1
Open the Stem Splitter
Go to the Defyaudio homepage and select the Stem Splitter tool from the toolbar.
- 2
Upload your audio file
Drag and drop your song or click to browse. MP3, WAV, FLAC, OGG, and M4A are all supported.
- 3
Select the number of stems
Choose between a 2-stem split (vocals / accompaniment) or a 4-stem split to AI separate instruments into vocals, drums, bass, and other.
- 4
Start processing
Click "Split Stems". The AI processes your file locally in your browser — no upload, no waiting in a queue.
- 5
Preview each stem
Listen to each isolated track directly in the browser before downloading to make sure the separation meets your needs.
- 6
Download your stems
Download individual stems or all tracks at once in high-quality WAV format, ready for your DAW or project.
Defyaudio vs Alternatives — Why Choose Defyaudio?
Looking for the best free stem splitter or a Demucs alternative that respects your privacy? Here is how Defyaudio compares.
100% private — no uploads
Most alternatives upload your files to their servers for processing. Defyaudio runs Demucs directly in your browser, so your music never leaves your device.
Powered by the same AI as paid tools
Defyaudio uses Demucs, the same open-source model behind many premium stem splitter services. You get professional-grade separation quality without the subscription price.
Free tier with no watermarks
Unlike some alternatives that watermark your output or cap quality on the free plan, Defyaudio delivers full-quality WAV stems on the free tier — up to 5 separations per day.
No queue, no waiting
Cloud-based Demucs alternatives often put free users in a processing queue. Because Defyaudio processes locally, your stem separation starts immediately on your own hardware.
Frequently Asked Questions
How does the stem splitter work?
Our stem splitter uses Demucs, a state-of-the-art AI model developed by Meta. It analyzes the audio frequencies and separates them into distinct instrument tracks using deep learning.
Is the stem separation really free?
Yes! Free users get 5 stem separations per day. For unlimited access, you can upgrade to our Pro plan.
What audio formats are supported?
We support all major audio formats including MP3, WAV, FLAC, OGG, M4A, and more. The output stems are provided in high-quality WAV format.
Is my music kept private?
Absolutely. All processing happens directly in your browser using WebAssembly. Your audio files never leave your device - we never see or store your music.
How long does stem separation take?
Processing time depends on your device and the song length. Typically, a 3-minute song takes 1-3 minutes to process on a modern computer.